Safety automatic operating means for pilot lights



PILOT LIGHTS Oct. 8, 192-9. E. A.FINN

"SAFETY AUTOMATIC OPERATING MEANS FOR Filed Feb. 17, 1928 2 sheets-sheet1 N INVENTOR Z Z1 1. Finn. BY

ATTORNEY E.-A. FINN ,731,196

Filed Feb. 17. 1928 2 sham-sheet 2 SAFETY AUTOMATIC OPERATING vmum's FbaPILOT LIGHT;

- INVENTOR EZLfl. fin n.

ATTORNEY Patented Oct. 8, 1929 UNITED STATES ELI n. FINN, or

NEW YORK, N. Y.

SAFETY AUTOMATIC OPERATING MEANS FOR PILOT LIGHTS Application filedFebruary -17, 1928. Serial I I'o. 255,063.

This invention relates to devices for automatically controlling the gassupply to the pilot light of a gas stove upon the opening of the burnersvalve.

eifective and easily installed nature which includes a novel pilot lighbcontrolling valve, by means of which and the cooperative connectionbetween the same and the burners valve the pilot flame is enabled toflash on as soon as a burners valve is moved toan extent suflicient tostart the flow of gas to the burner. Another object is so to constructthe pilot valve operating mechanism that during the commencement of theact of turning on a burners valve, the pilot light valve will be openedand held open until the burners valve has been moved far enough to causegas to issue from the burner and become ignited, further opening of theburners valve then causing a release of the pilot lights valve and thereduction of the pilot flame to the minimum.

Another object is to provide a means for operating the valve of a pilotlight separatelyfrom a plurality of burner valves through a commonactuator, so arranged that the actuator will at all times be ready tofunction as soon as one or another of the burner valves Figure 1 is aplan view of a four burner.

gas stove and pilotwith my invention applied. a

Figure 2 is an enlarged detail plan view of the burners valve and thepilot lights valve together with the mechanism efiecting cooperationbetween the same.

Figure 3 is an enlarged detail cross section on the line 33 of Figure 2.

An object is to provide a device of a simple,

Figure 4 is an enlarged detail cross section on the line 4-4 of Figure2.

Figure 5 is a perspective view of the prime mover arm, per se. 5

Figure 6 is a detail perspective view showing one of the bar movingmembers and its means of support.

Figure 7 is an inverted plan of the prime moving lever,-per se.

Figure 8 is anenlarged detail section showing one of the pin guides.

In the drawings, in which like numerals of reference designate likeparts in all of the figures, 1 represents the usual gas burners of astove, which burners are provided with the usual mixing tubes 2 and gasvalves 5 interposed in the laterals 4 from the gas main 3 to the mixingtubes.

The gas burners valves 5 have stems 6 and handles 7, the handles beingsecured in place by screws 8. All of the foregoing parts may be of theusual construction.

In applying (my invention to a gas stove 1 provide a nut 9 on each screw8 to hold the eye 10 ofthe prime mover arm 11 that actuates theautomatic device for turning on the pilot valve when a gas burner isturned on.

The arm 11 has an end 12 to which is pivoted a dog 15, a stop 13 beingprovided on the end 12 to limit the movement of the dog 15 in onedirection.

The arm 11 has a fork 14 to fit around the valve stem and assist the eye10 in maintaining the arm 11 in a rigid connection with the handle endof the valve stem. 1

16 is a restoring spring connecting the dog 15 with the end 12 of thearm 11 and continuously tends to hold the dog against the back stop 13hereinbefore referred to. I

17 designates a stationary plate which, through the medium of brackets18, is mounted on the gas main 3 and rigidly secured thereto. A movablebar 19 is'pivoted at 20 tothe plate 17 and normallylies approximatelyparallel to the plate but separated "therefrom, a spring 21 beingprovided for moving the bar away from the plate. The bar 19 also isguided on pins or lugs22 carried by the stationary plate 17 A pluralityof bar-moving or secondary levers 23 are provided, one for each burnervalve. These levers 23 are suitably supported from the plate 17 bybrackets 26 to which the levers 23 are pivoted as shown. The levers 23carry anti-friction rollers 24 which are adapted to work against the bar19 when pressed into engagement with the same by the action of the dog15. In order to limit the movement of the lever 23 in a direction toremove the roller 24 from engagement with the bar 19, a stop 27 isprovided on the'bracket 26 to which bracket the lever ispivoted.

The bar 19 carries a pilot valve operating arm 28 which has a cam 29 topress on the stem of the pilot valve and push it ,down'to open the flowof gas to the pilot burner.

The pilot valve, which constitutes one of the improvedfeatures of mypresent invention, embodies a casing 34 having a suitable inlet duct orpassage connected by a lateral 30 with the main 3. Italso has an outletduct or passage connected bv a pipe 31 with the pilot burner 32, thelatter having the usual a guard (ap 33, as indicated.

The casing 34 has a tapered chamber intersected by the inlet and outletducts respectively to receive the tapered plug 35' which acts as a valve.seat and which is itself provided with gas ports 36 to effectcommunibeing located around the stud within the cas-- ing in a mannercontinuously tending to seat the valve 38- In order to prevent escape ofgas through the bottom joint of the valve, packing washers 41 and 42respectively are provided.

It will be observed by reference to Figure 3 of the drawings that thetapered valve spindle 38 has a cylindrical bottom. section 46 and acylindrical top section 47. The

cylindrical bottom section 46 fits the cylindrical bottom portion 48 ofthe casing 34 as shown.

The valve stem has a button 49 with which the cam 29 cooperates.

In using my invention the parts are so adjusted that when the burnervalves are in the closed,position the dog 15 of each valve will rest inworking contact with the lever 23,

the rollers 24 of which always lie in proximity to the bar 19. In thenormal position of the bar (the position away from the supporting plate)it will hold the cam 29 in a position to release its pressure on thebutton 49 of the pilot valve so that only the normal flame of the pilotlight will burn when the burner valves are in the closed position. Thedegree of this normal flame may be adjusted by means of the nut 44 sinceby turning that nut the valve 38 may be moved from or permitted to bemoved toward its seat, accordingly as the nut is turned one way or the,other. Having adjusted the pilot burner to give the normal flame, thenwhen .a burners valve is turned from the closed toward the open positionthe dog 15 will press against the heel of the lever 23, forcingtheroller 24 to press the bar 19 toward the supporting plate 17 andthereby cause the cam 29 to ride the button 49.- Since the cam isprevented from rising through the medium of its arm 28 it necessarilyfollows that the valve 38 will be depressed. Depression of the valve 38,of course, increases the clearance between the valve and its seat andpermits a greater flow of gas through the pilot burner, which causes thepilot light to flare and project a flame to each heating burner. Theheating burner whose valve has thus been turned on will have the gasissuing from the burner ignited by the projected pilot flame. .After theburners valve has been moved toward the fully opened position through adefinite distance the dog 15 will ride olf the lever 23 and permit thespring 21 to return the bar 19 to its normal position, thereby removingthe cam 29 from the button 49 and permitting the pilot. valves spring 45to restore the pilot valve to its normal condition, leaving it ready tobe operated again should any other burnerbe turned 'on. v

.In turning off the burner valve the dog 15 will pass over the heel ofthe lever 23 and again come into position for operation.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the complete construction,operation and advantages of my invention will be readily understood bythose skilled in the art to which my invention relates.

While I have disclosed a certain specific embodiment of my inventionitis obvious that changes in the details of construction,-

arrangement and design of parts may be made without departing from thespirit orthe scope of the appended claims.

What I claim is:

- valve, a pilot valve actuating cam carried b said bar, a bar movinglever adjacent eac burner valve, means for mounting said bar movingleverindependently of,said bar, and a lever actuatingarm on each burnervalve 1. In a stove having burner valves and a stem to actuate ,itsrespective bar moving lever as the burner valve is opened for thepurposes specified.

2. In stoves having a plurality of burner valves and a pilot valve; asupporting plate and a bar hinged thereto at one end, said plate and barbeing associated with all said valves, a pilot valve opening cam devicecarried by said bar and means operable by each burner valve separatelyto cause operation of said bar as a burner valve is opened, thereby toopen said pilot valve and a spring 'device on said plate to engage thefree end of said bar and urge said bar in one direction. 3. In stoveshaving a plurality of burner valves and a pilot valve; a supportingplate and a bar hinged thereto, said plate and bar being associated withall said valves, means operable by each of said burner valves to actuatesaid bar 'to increase the opening of said pilot valve, said meansincluding a bar moving lever and a prime mover arm for each burnervalve.

4. In stoves having a plurality of burner valves and a pilot valve; asupporting plate and a bar hinged thereto. said plate and bar beingassociated with all said valves, means operable by each of said burnervalves to actuate said bar to increase the opening of said pilot valve,said means including a bar moving lever and a prime mover arm for theburner valve, said prime mover arms each having one-way-operating dogsto actuate the respective levers.

5. In stoves having a heating burner and its burner valve, and having apilot and its pilot valve; means to operate said pilot valve to increasethe action of the pilot burner for igniting fuel issuin from the heatingburner upon opening the burner valve, said means comprising a pivotedbar having a cam member associated with said pilot valve, an actuatingarm carried by said heating burner valve, and means mountedindependently of said bar and operated on by said arm to cause Imovement of said bar thereby to actuate said pilot valve.

6. In stoves having a heating burner and its burner valve, and having apilot burner and its pilot valve; means to operate said pilot valve toincrease the action of the pilot burner for igniting fuel issuing fromthe heating burner upon opening the burner valve, said means comprisinga pivoted bar having a cam member associated with said pilot valve, anactuating arm carried by said heating burner valve, means operated on bysaid arm to cause movement of said bar thereby to actuate said pilotvalve, said last named means compris ing a bar-moving-lever and aone-way-acting dog carried by said actuating arm to engage with saidlever for the purposes specified.

7. Instoves having pilot lights and their valves, a pilot burners valvecomprising a casing with an inlet and an outlet passage, a tapered plugintersecting said passage and itself having a tapered passage and portsleading therefrom to said inlet and outlet sides of said inlet andoutlet passages, a tapered spindle in said tapered passage,

yielding means tending to seat said spindle to said chamber and anoutlet duct from said chamber, a tapered plug filling said chamber anditself having a passage connected with said inlet and outlet ducts, avalve spindle with tapered seat in said passage, spring means in saidcasing to seat said spindle,

means operable from the outside of said casing to move said spindleagainst the springs action, and other means outside said casing toadjust the position of said spindle thereby to increase or diminsh theflow of fuel through said passage, and means packing said plug andspindle against leakage of fuel.

9. A pilot burners valve comprising a casing having a tapered chamber,an inlet duct to said chamber and an outlet duct from said chamber, saidchamber entering from the upper end of said casing, a stufling box nutwith packing secured to said casing over the 'upper end of said chamber,a tapered plug filling said chamber and itself having a passageconnected with said inlet and outlet ducts, said tapered plug having atapered bore with which said plug passage communicates, a valve spindleincluding a tapered portion within said tapered plug, said valve spindlehaving its outer surface imperforated, said valve spindle having acylindrical stem passing through said stufiing box nut whereby theescape of gas around said stem will be prevented, the lower end of saidvalve spindle being reduced and projected through an aperture in saidcasing, said casing having a spring chamber, a spring around saidreduced end in said spring chamber and a nut on the outer extremity ofsaid reduced end, all being arranged whereby when said valve spindle isdepressed gas will flow through said tapered plug passa e into theinterior of tapered plug to said outlet ductof the casing,

substantially as specified.

- ELI A. FIVN.

